minor, add api to get table_ext from table_desc

Project: http://git-wip-us.apache.org/repos/asf/kylin/repo
Commit: http://git-wip-us.apache.org/repos/asf/kylin/commit/a54f016a
Tree: http://git-wip-us.apache.org/repos/asf/kylin/tree/a54f016a
Diff: http://git-wip-us.apache.org/repos/asf/kylin/diff/a54f016a

Branch: refs/heads/2622-2764
Commit: a54f016aff86e93652e7df0a401c270ca6795d13
Parents: 4b3a44b
Author: lidongsjtu <lid...@apache.org>
Authored: Fri Sep 1 14:44:00 2017 +0800
Committer: Hongbin Ma <m...@kyligence.io>
Committed: Fri Sep 1 17:53:18 2017 +0800

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 .../src/main/java/org/apache/kylin/metadata/MetadataManager.java | 4 ++++
 1 file changed, 4 insertions(+)
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http://git-wip-us.apache.org/repos/asf/kylin/blob/a54f016a/core-metadata/src/main/java/org/apache/kylin/metadata/MetadataManager.java
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diff --git 
a/core-metadata/src/main/java/org/apache/kylin/metadata/MetadataManager.java 
b/core-metadata/src/main/java/org/apache/kylin/metadata/MetadataManager.java
index 367ad64..b8141fe 100644
--- a/core-metadata/src/main/java/org/apache/kylin/metadata/MetadataManager.java
+++ b/core-metadata/src/main/java/org/apache/kylin/metadata/MetadataManager.java
@@ -217,6 +217,10 @@ public class MetadataManager {
         if (t == null)
             return null;
 
+        return getTableExt(t);
+    }
+
+    public TableExtDesc getTableExt(TableDesc t) {
         TableExtDesc result = srcTableExtMap.get(mapKey(t.getIdentity(), 
t.getProject()));
 
         // avoid returning null, since the TableDesc exists

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